On Tue, Feb 26, 2019 at 11:56:15PM +0800, Kairui Song wrote: > arch/x86/hyperv/hv_init.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c > index 7abb09e2eeb8..92291c18d716 100644 > --- a/arch/x86/hyperv/hv_init.c > +++ b/arch/x86/hyperv/hv_init.c > @@ -406,6 +406,10 @@ void hyperv_cleanup(void) > /* Reset our OS id */ > wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0); > > + /* Cleanup page reference before reset the page */ > + hv_hypercall_pg = NULL; > + wmb();
What do we need that SFENCE for? Any why does it lack a comment? > + > /* Reset the hypercall page */ > hypercall_msr.as_uint64 = 0; > wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); > -- > 2.20.1 > _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
